<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <style type="text/css">
        body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
    </style>
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=i7XixgKn2RQvaYZlCNtRfXKbjxcPgUNR"></script>
    <title>根据城市名设置地图中心点</title>
</head>
<body>
<div id="allmap" style="width: 1200px; height: 675px;"></div>
</body>
</html>
<script type="text/javascript">
    // 百度地图API功能
    var map = new BMap.Map("allmap",{minZoom:4,maxZoom:20}); // 创建Map实例,设置地图允许的最小/大级别

    var point = new BMap.Point(117.217, 39.142);
    map.centerAndZoom(point, 15);
    map.enableScrollWheelZoom(true);   //允许地图的放大和缩小
    var marker = new BMap.Marker(point);  // 创建标注
    map.addOverlay(marker);               // 将标注添加到地图中

//    单击获取点击的经纬度
    map.addEventListener("click",function(e){
        map.clearOverlays();
        var point = new BMap.Point(e.point.lng, e.point.lat);
        map.enableScrollWheelZoom(true);   //允许
        var marker = new BMap.Marker(point);  // 创建标注
        map.addOverlay(marker);               // 将标注添加到地图中
        marker.setAnimation(BMAP_ANIMATION_BOUNCE); //跳动的动画
    });

    marker.setAnimation(BMAP_ANIMATION_BOUNCE); //跳动的动画
</script>